Disk-insulator.



L. STEINBBRGER. DISK INSULATOR. APPLICATION FILED NOV. 27, 1905.

Patented Feb. 23, 1909.

/N VEN TOH W/TNESSES:

A 77' OHNE YS.

-To facilitate the draining of moisture in cer- UNITED STATES 'PATENT cierren.

LOUIS STEINBERGER, OF NEW YORK, N. Y.

DISK-INSULATOR.

Specification of Letters Patent.

Patented Feb. 23, 1909.

Application and November 27, 1965. serial No. 289,214.

1. To enable several disks of insulating material to be locked together upon a pin independently of the support for said pin; l To enable the disks' to tit together watertight without undue strain upon the material of which the disks are composed; 3. To provide the disks with corrugations ot' various kinds for the purpose of providing increased surface for surface leakage; 4.

tain directions so as to render the moisture harmless; To enable certain of the disks to be screwed directlyr together independently of the support; 6. To enable the disks to be readily removed, if desired; 7. To provide'an insulator disk an improved article of manufacture.

Reference is to be had to the accompany ing drawings forming a part of thisv specification, in which similar characters of reference indicate corresponding parts/in all the' figures.

Figure 1 is a vertical section showing 'an insulatorand pin therefor made in accord ance. with-my invention; Fig. 2 is a plan view of the upper disk; Fig. 3 is an inverted plan or bottom view of middle disk 161 removed rom the pin; and Fig. 4 is a fragmentary vertical section through the upper disk and is taken upon the line 4-4 of Fig. 1, looking in the direction of the arrow.

The cross arm is shown at 5, and the pin which has the general form of a cone frustum is shown at 6. This pi is provided with'a stem 7 which projects through the cross arm 5 and serves to hold the pin firmly thereupon. A washer 8,'a jam nut 9 and a nut lock 10 are mounted upon a threaded neck I1' integral with the stem 7 The pin 6 is providedrwith a. bulbular enlargement 12, and also with a threaded upper end 13.

At14 is a sleeve provided at its bottm with a threaded neck 14a and at its top with a. threaded neck 14. This sleeve is also provided with corrugations 141. A disk 15 has a conformity enabling it to fit upon the hulbulu:l enlargement 12, and encircles the pin 'lhe upper surface of the disk 15 is' provided with annular corrugations 15a concentric with cach'other. The lower surface ci the disk 15 is similarly provided with annuiur corrugations 15". A threaded portion 15 ot the disk 15 encircles the threaded neck lei- The disk 1Gb is provided upon its under side lwith annular corrugations 16c disposed coiicentrically in relation to each other and 1s turther provided with a neck 1G having corrugations 16d disposed one over the other, the neck terminating at its top in an annular bead 16e. The top disk is shown at 17 and is provided with radially projecting ribs 17a, these ribs having substantially the contour indicated in Figs. 2 and 4. Mounted upon the top disk 17 and integral therewith is a head 18 'provided with a slot 19 for thc pnrposeof supporting a conductor. A washer or gasket 2O of a resilient insulating material, preferably soft rubber, encircles the neck 16e, and resting upon this gasket is an annular ange 21 integral with the upper disk 17. The flange 21 and the neck 16C are smooth relativelyT to each other. Resting upon the threaded end 13 of the pin 6 is a soft rubber disk 22. The disks and sleeve are made of insulating material, preferably electrose The enlargement 12vof the .pin prevents the lower disk from slipping downward and furnishes it with a firm base of support. disk 15, the sleeve 14 and the' neck 16 may be locked together independently of the pin 6 by merely screwing them together, or may be mounted one at a time on the pin and then locked together. The upper disk 17 is somewhat independent of the lower and the middle disks, and is mounted directly upon the threaded end 13.V If desired, the pin and the disks may be assembled before the pin is mounted upon the cross arm.

By virtue ot the annular concentric corrugations 15b, 16C, 17", the path of the sur- The lower iol . I l if, v line ofsurface leakage, but 1n a direction indepei'ident of that of the other corrugations. The radial ribs 17a serve not only to strengthen the upper disk 17, but also to direct the flow of water or dripping of moisture. The gasketl 2O and the disk 22 pre vent excessive rigidity between the parts such as would tend to cause them to break when properly assembled. These gaskets 'also tend to prevent leakage ofthe current.

' I do `not limit myself to the enact form. nor-to the number of disks herein shown,v

claim-as new and desire to' secure by Letters '1. A diskfinsulator, comprising a disk' anda neck-integral therewith, said disk and said neck both being provided with corrugations,\and means for supporting said disk and said neck. 2. A` disk insulator, comprising a disk of insulating material and provided with twol faces,a"'nd further provided with annular corrugations upon bothl osaid faces, said disk being furtherprovided with means whereby it may be mounted. f A

3. 'A' disk insulator, comprising a vbody portion provided Witha neck integral there? with and' extending therefrom', said body portion being further providedwith annular corrugations ciA different diametersand said l supporting said body portion.

4. A disk insulator, comprising a body portion provided with a neck extending vtherefron'i and integral therewith, said body port-ion being provided with annular corrugations of dilfcrent diameters and said neck being provided with corrugations disposed one above the. other, said body portion being provided with a hole extending entirely through it and through saidv neck, and means for supporting-said body portion.

5. A locking disk insulator, comprising a plurality oi body portions, each provided with apart having the form of a large disk, the several body portions being provided with means whereby they may be detachably locked together independently of any means for supporting them.

6. A locking disk insulator,;comprising,a plurality of disks of insulating material, and meansy for locking said disks together under spring tension.`

7. An insulator comprising a supporting member, and a disk of insulating material encircling said supporting member. and supported thereby, said disk being thicker at its middle than at its edges and being pro-. vided upon both. of its faces with irregularities for the-.purpose of increasing its surface. In testimony .whereof I havey signed my name to this specificationin lthe presence ot two subscribing witnesses.

y 'LOUIS STICTNBERGER.

Witnesses: .Y Evenmin B. lvL-msnami, WAI/ron Harrelson. 

